The number of studies on usability of university web sites is very limited. A usability study to improve a clinical decision support. The principal value of the sus is that it provides a single reference score for participants view of the usability of a product or service. Comparing sus scores across different stages of a project shows how usability is changing. An empirical evaluation of the system usability scale taylor. System usability scale ryte wiki the digital marketing.
The system usability scale sus is a simple, widely used 10statement survey developed by john brooke while at digital equipment corporation in the 1980s as a. About 20 years ago, john brooke published the concept of a system usability scale, a reliable, lowcost usability scale that can be used for global assessments of systems usability. Accessibility 25 contentstrategy 71 informationarchitecture 6 interaction. System usability scale sus and the computer system. We talked about his motivation and process for creating the now famous quick and dirty questionnaire. Oct, 2017 quick usability measurements of applications, websites, and services. Evaluation of usability of a neonatal health information system. Their article is based on almost 10 years worth of sus data more than 200 sus studies. Jan 06, 2015 you need a quick usability assessment of an already deployed system.
Jus journal template the journal of usability studies. It was developed by john brooke at digital equipment corporation in the uk in 1986 as a tool to be used in usability engineering of electronic office systems. The system usability scale sus is a simple, widely used 10statement survey developed by john brooke while at digital equipment corporation in the 1980s as a quickanddirty subjective measure of system usability. In an interesting correspondence to these empirically based grading scales, we have noted that. Measuring usability with the system usability scale sus. The need for a foundation for evaluating usability evaluation methods among interactive system developers and users there is now much agreement that usability is an essential quality of software systems. During a development experience in 2009, we used a crosssectional method to look at the effects of user profiles on ratings for commercial products that use one such instrument, the system usability scale or sus. Empirical evaluation of the system usability scale semantic scholar. Reassessing the usability metric for user experience umux scale. System usability scale sus is a questionnaire that is used to evaluate the usability of products and services. To get a more complete picture, we need to rely on usability metrics that are standardized and commonly used throughout many industries, as a means to benchmark our designs when running unmoderated and moderated user research studies.
The effect of experience on system usability scale ratings. The factor structure of the system usability scale. Quick usability measurements of applications, websites, and services. Perceived usability evaluation of learning management. You need a quick usability assessment of an already deployed system. Revitalizing sus, the system usability scale jens oliver meiert. However, surprisingly few studies have used sus to evaluate the perceived usability of learning management systems lmss. Pdf from humble beginnings, the sus has become a valuable tool in the toolkits. Pdf item benchmarks for the system usability scale researchgate. A sus score appeals to stakeholders because it is simple, reliable and costeffective. A practical guide to the system usability scale sus.
In systems engineering, the system usability scale sus is a simple, tenitem attitude likert scale giving a global view of subjective assessments of usability. This questionnaire is used as a quantitative method to dwell upon the global view on the subjective assessment of usability. It was developed by john brooke 1 at digital equipment corporation in the uk in 1986 as a tool to be used in usability engineering of electronic office systems. When a sus is used, participants are asked to score the following 10 items with one of five responses that range from strongly agree to strongly disagree. Revitalizing sus, the system usability scale jens oliver. Rather more than 25 years ago, as part of a usability engineering program, i developed a questionnairethe system usability scale susthat could be used to take a quick measurement of how people perceived. Sus is based on a likert scale questionnaire with standardized content that gives an overall usability and user satisfaction index ranging from 0 to 100. Miller, journalinternational journal of humancomputer interaction, year2008, volume24, pages574 594. Usability evaluation any analysis or empirical study of the usability of a prototype or system goal is to provide feedback in software development in support of an iterative development process recognize problems, understand underlying causes, and plan changes goals of usability evaluation design construction formative evaluation. The system usability scale sus is a questionnaire which can be used to help evaluate the usability of a project. Analytical and empirical methods for usability evaluation. An empirical evaluation of the system usability scale dois. Evaluation plan for usability testing of module prototypes. I had the fortune to meet with john in person last month in london.
Usability evaluation is evaluation on the quality of the usability of the interface design. Current evaluation methods developed to measure efficiency, effectiveness and user satisfaction of information technology are based on usability principles for all software. Costbenefit chrarcteristics of usability inspection methods. The system usability scale sus is a tenitem rating scale for measuring. Usability and context usability is not a quality that exists in any real or absolute sense. A retrospectivejus the journal of usability studies. European portuguese validation of the system usability scale. This article presents nearly 10 years worth of system usability scale sus data collected on numerous products in all phases of the. Sus system usability scale, a summary malin fabbri. Since its introduction in 1986, the 10item system usability scale sus has been assumed to be unidimensional. European portuguese validation of the system usability.
It has become an industry standard with references in over 600 publications. The system usability scale sus is the most widely used standardized questionnaire for the assessment of perceived usability. An overview of the system usability scale in library. The system usability scale sus is a standardized metric for measuring the usability of a website or other interactive system. I think that i would need the support of a technical person to be able to use this system. Usability and context usability is not a quality that exists in. One of the most recent studies on usability of university websites is conducted by caglar and mentes 2012 the study reveals dissatisfaction and other usability problems of a european university of lefke which is located at northern cyprus. Empirical evaluation of the system usability scale orfanou, tselios, and. I think that i would like to use this system frequently. System usability scale sus a key tool in that usability metric toolbox is the system usability scale. Ill embed a link in the question for context for those unfamiliar with the term. The system usability scale sus was released into this world by john brooke in 1986. The translation is based on a crowdsourcing project initiated by wolfgang reinhardt during his time at the university of paderborn. However, surprisingly few studies have used sus to evaluate the perceived usability of learning management.
It was developed by john brooke 1 at digital equipment corporation in the uk in 1986 as a tool to be used in usability engineering of electronic office systems the usability of a system, as defined by the iso standard iso 9241 part. The system usability scale, or sus, is a simple survey that provides a highlevel score for the usability of a product. For almost 20 years, practitioners and researchers have been using the system usability scale sus as a quick and dirty method of evaluating the usability of different websites, software, and other humanmachine systems. This post provides details and some tools to get started right away. Application assessing product with system usability scale. The system usability scale sus is an inexpensive, yet. Mar 26, 20 in an empirical evaluation of the system usability scale2 the author claims that for internetbased web pages 50 users are needed to get a good result. This work is licensed under a creative commons attribution 4. Op if youre using acronyms in questions you shouldnt assume everyone knows what you are referring to. The system usability scale sus is the most used questionnaire to measure perceptions of usability it was developed 30 years ago by john brooke. On the dimensionality of the system usability scale. Sus includes 10 questions that are analyzed as a whole.
It consists of a 10 item questionnaire with five response options for respondents. The system usability scale sus is a simple, tenitem scale giving a global view of subjective assessments of usability. This association strengthens the validity of the sus. Jul 12, 2016 the system usability scale sus is the most used questionnaire to measure perceptions of usability. Home topics methods usability evaluation methods questionnaire and survey methods system usability scale sus originally created by john brooke dec in 1986, sus is one of the best known standardized usability rating scales. Positioning inspection in the usability engineering lifecycle. Among the hci and usability communities, there is also much agreement that.
Relation between usability inspection methods and user testing. Perceived usability evaluation of learning management systems. One of the methods to assess usability is the use of surveys, for example the often used system usability scale 29, 30. Feedback from our customers further underlines the exceptional usability of azurion average 0 68 100 87 the sus is based. These are not percentages and should be used in terms of their percentile ranking. It is often assumed that a likert scale is simply one based on forced. In measuring usability with the system usability scale sus 4 the author states that the user group and the reliability of the test is unrelated and a sus assessment can be done with as.
Perceived usability affects greatly students learning effectiveness and overall learning experience, and thus is an important requirement of educational software. The questionnaire is used as a quantitative analysis method within the framework of usability tests. The system usability scale sus is widely used as a quick method for measuring usability. Application assessing product with system usability scale the. Measuring usability with the system usability scale sus it is the 30th anniversary of the creation of the most used questionnaire for measuring perceptions of usability. Rather more than 25 years ago, as part of a usability engineering program, i developed a questionnairethe system usability scale susthat could be used to take a quick measurement of how people perceived the usability of computer systems on which they were working. Evaluation plan for usability testing of module prototypes for the project called. These survey questions are used as a quantitative method to evaluate and get actionable insights on the usability of a wide variety of new systems which may be either software or hardware the system usability scale consists of only 10 questions. Evaluation assessing the usability of an existing design. Miller, 2008, shows the distributions of scores for individual surveys and for overall studies. Sus is a technology independent ten item scale for subjective evaluation of the usability. The system usability scale sus provides a quick and dirty, but a reliable tool for measuring the usability.
System usability scale sus usability body of knowledge. Sus the system usability scale in response to these requirements, a simple usability scale was developed. I think that i would like to use this website frequently. The instrument system usability scale sus was devel oped by brooke, in. Long a favorite among ux researchers for its simplicity and accuracy, sus is a valuable quantitative tool for anyone trying to optimize the user experience. The 10 system usability has been evaluated by 34 independent health experts mean36. Severity of usability problems found by usability inspection. This is a validated survey instrument, which consists of 10 items that have to be rated on a 5point agreement scale 29.
Two common methods used for this evaluation process are heuristic evaluation analytical method and user testing empirical method. Methodology system usability scale measurement tool. System usability scale survey template by questionpro is a questionnaire that is used to evaluate the usability of a project. The usability evaluation will establish contact with users and ascertain their opinions about the. This article presents nearly 10 years worth of system usability scale sus data collected on numerous products in all phases of the development lifecycle. An empirical evaluation of the system usability scale by. It provides a reference score for participants subjective view of a products or services usability.
Empirical evaluation of the system usability scale orfanou, tselios, and katsanos this work is licensed under a creative commons attribution 4. Interpreting the scores usually involves the following process. All the systems in the product line have commonalities and variability. This paper presents an empirical evaluation of the sus questionnaire in the context of lmss perceived usability evaluation. The sus consists of only 10 questions, which are answered using a. System usability scale survey template sample survey. For almost 20 years, practitioners and researchers have been using the system usability scale sus as a quick and dirty method of evaluating the usability of different websites, software.
The system usability scale sus is a widely used selfadministered instrument for the evaluation of usability of a wide range of products and user interfaces. This chapter describes the system usability scale sus a reliable, lowcost usability scale that can be used for global assessments of systems usability. Factor analysis of two independent sus data sets reveals that the sus actually has two factors usable 8 items and learnable 2 items specifically, items 4 and 10. An overview of the system usability scale in library website. The participants scores for each question are converted to a new number, added together and then multiplied by 2. Questionnaire and survey methods system usability scale sus originally created by john brooke dec in 1986, sus is one of the best known standardized usability rating scales. The sus is a 10 item questionnaire with 5 response options. In an empirical evaluation of the system usability scale2 the author claims that for internetbased web pages 50 users are needed to get a good result. For german users, a group of sap usability professionals made a translation available in 20 which we proudly repost in this community. In an analysis of the system usability scale, bangor, kortum, and miller note the survey provides a single score on a scale that is easily understood by a wide range of people from project managers to computer programmers 2008, p. The system usability scale sus is a wellresearched and widely used questionnaire for perceived usability evaluation. These survey questions are used as a quantitative method to evaluate and get actionable insights on the usability of a wide variety of new systems which may be either software or hardware. This article briefly described the differences between qualitative and quantitative usability study methods, indicated that high cost is one of the disadvantages of quantitative methodologies, and introduced the system usability scale sus, which is a quick, efficient and reliable usability study method, and explained suss working process.